Answer:
erosion
Explanation:
grows into the eirth each year. the atmosphere and how the worldchanges every year
 
        
             
        
        
        
Answer:
dt/dx = -0.373702
dt/dy =  -1.121107
Explanation:
Given data 
T(x, y) = 54/(7 + x² + y²)
to find out 
rate of change of temperature with respect to distance
solution
we know function
T(x, y) = 54 /( 7 + x² + y²)
so derivative it x and y direction i.e
dt/dx = -54× 2x / (7 +x² + y²)²    .........................1
dt/dy = -54× 2y / (7 + x² + y²)²      .........................2
now put the value point (1,3) as x = 1 and y = 3 in equation 1 and 2 
dt/dx = -54× 2(1) / (7 +(1)² + (3)²)²  
dt/dx = -0.373702
and 
dt/dy =  -54× 2(3) / (7 + (1)² + (3)²)² 
dt/dy =  -1.121107
 
        
             
        
        
        
Answer:
Epithelial tissue and Muscle tissue
Explanation:
 
        
             
        
        
        
As we know that two charges exert force on each other when they are placed near to each other
The force between two charges is given as

here we know that
 = two different point charges
 = two different point charges
r = distance between two point charges
also we know that two similar charges always repel each other while two opposite charges always attract each other
so here correct answer would be
<em>A. A positive and negative charge attract each other.</em>